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Steganography with photo-responsive dyes

a dye and steganography technology, applied in the field of dyes and inks, can solve the problems of counterfeiting or otherwise circumvented, and achieve the effect of different relaxation/recovery times

Active Publication Date: 2014-03-25
LOCKHEED MARTIN CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a way to use modulated or sequential illumination to distinguish between different dyes that have similar or overlapping responses. This allows for better analysis and interpretation of images or codes that use different dyes. The technique takes advantage of the different relaxation or recovery times that dyes have after being excited. The result is a more accurate and reliable system for analyzing and interpreting images or codes.

Problems solved by technology

Various security and anti-tamper and authentication solutions making use of fluorescent or otherwise photo-responsive inks are currently known, but they have deficiencies that enable them to be readily counterfeited or otherwise circumvented.

Method used

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  • Steganography with photo-responsive dyes
  • Steganography with photo-responsive dyes
  • Steganography with photo-responsive dyes

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Embodiment Construction

[0025]The following detailed description of the invention refers to the accompanying drawings. The same reference numbers in different drawings identify the same or similar elements. Also, the following detailed description does not limit the invention. Instead, the scope of the invention is defined by the appended claims and equivalents thereof.

[0026]Dyes such as anti-stokes fluorescent dyes, or similar dyes that may be used to produce inks or pigments that are visible but also responsive to photo-excitation as specific (visible or non-visible) frequencies may be used to generate visible codes that have a secondary, frequency-specific component which may or may not be visible.

[0027]In one embodiment, two photo-responsive dyes having the same emission frequency but disparate excitation frequencies may be applied to create a visible alpha-numeric, bar-code, two-dimensional image-based code, or three-dimensional and / or holographic image-based code. Part of the code printed in the firs...

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PUM

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Abstract

An article identifier or code including at least one photo-responsive dye and a method of encoding or embedding information in same. A reader device for decoding or extracting information in an article identifier or code and verifying or authenticating that information and the associated extraction and authentication methods.

Description

BACKGROUND OF THE INVENTION[0001]In the field of inks and dyes, there are several applications for fluorescent inks and dyes and combinations of florescent inks and dyes having disparate or complementary frequency responses. Various security and anti-tamper and authentication solutions making use of fluorescent or otherwise photo-responsive inks are currently known, but they have deficiencies that enable them to be readily counterfeited or otherwise circumvented. Fluorescent or similarly photo-responsive dyes are typically used so that the photo responses of the dyes do not overlap or are otherwise readily visibly distinguishable during simultaneous or single-source illumination. It would be a significant advantage, however, to leverage multiple photo-responsive materials to create a visible code that used sequential or modulated illumination, multiple illumination sources, and / or forms of spectral filtering to add further layers of security and authentication to the code.INVENTION ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): G06K19/00G06K19/06G06V10/143G06V10/145
CPCG06K9/2036B41M3/144G06K2019/06225G06K9/2018G06K7/12G06K19/06046G06K19/0614G06V10/143G06V10/145
Inventor ADAMS, CHRISTIANVAUGHN, RICHARD ALLENWRIGHT, JOE M.
Owner LOCKHEED MARTIN CORP
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